From: Pali Rohár <pali.rohar@xxxxxxxxx> This patch has been added to the 3.18 stable tree. If you have any objections, please let us know. =============== [ Upstream commit 25ab1617bf735b8a411104c60852651cae6769fd ] commit a4b45b25f18d1e798965efec429ba5fc01b9f0b6 upstream. CPU fan speed going up and down on Dell Studio XPS 8100 for unknown reasons. Without further debugging on the affected machine, it is not possible to find the problem. Link: https://bugzilla.kernel.org/show_bug.cgi?id=100121 Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx> Tested-by: Jan C Peters <jcpeters89@xxxxxxxxx> [groeck: cleaned up description, comments] Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- drivers/char/i8k.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c index 471f985..26397bb 100644 --- a/drivers/char/i8k.c +++ b/drivers/char/i8k.c @@ -796,6 +796,21 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = { { } }; +static struct dmi_system_id i8k_blacklist_dmi_table[] __initdata = { + { + /* + * CPU fan speed going up and down on Dell Studio XPS 8100 + * for unknown reasons. + */ + .ident = "Dell Studio XPS 8100", + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Studio XPS 8100"), + }, + }, + { } +}; + /* * Probe for the presence of a supported laptop. */ @@ -806,7 +821,8 @@ static int __init i8k_probe(void) /* * Get DMI information */ - if (!dmi_check_system(i8k_dmi_table)) { + if (!dmi_check_system(i8k_dmi_table) || + dmi_check_system(i8k_blacklist_dmi_table)) { if (!ignore_dmi && !force) return -ENODEV; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html